JP2016199182A - Attachment structure of front underrun protector - Google Patents

Abstract

A front underrun protector is supported by a suspension bracket that supports a front end portion of a leaf suspension, and the front end portion of the leaf suspension is maintained even when an excessive load is input from the front underrun protector. Providing a mounting structure for the front under-run protector that can be made to operate. A suspension bracket is fixed to a vehicle body frame and supports a front end portion of a leaf suspension. The FUP support bracket 7 is fixed to the vehicle body frame 3 via the suspension bracket 4 by being fastened to the suspension bracket 4 from the vehicle width direction, and supports the FUP 10 extending in the vehicle width direction from the rear at the front end portion of the vehicle 1. [Selection] Figure 1

Description

  The present invention relates to a mounting structure for a front underrun protector of a vehicle.

  Patent Document 1 discloses a front underarm in which a front spring bracket that supports a front end portion of a spring of a spring suspension is integrally formed with an arm portion that protrudes forward, and a front underrun protector is fixedly attached to the arm portion. The mounting structure of the run protector is described.

JP 07-004209 A

  In the above structure, the arm part is formed integrally with the front spring bracket (suspension bracket), so if an excessive load is input from the front underrun protector during a vehicle collision, the suspension bracket will be detached from the body frame and the spring (leaf suspension) ) Is released from the support state of the front end, and the vehicle may not be able to travel.

  Therefore, the present invention supports the front underrun protector by the suspension bracket that supports the front end portion of the leaf suspension, and supports the front end portion of the leaf suspension even when an excessive load is input from the front underrun protector. An object of the present invention is to provide a mounting structure for a front underrun protector capable of maintaining the state.

  In order to achieve the above object, the mounting structure for a front underrun protector according to the first aspect of the present invention includes a suspension bracket and a protector support bracket.

  The suspension bracket is fixed to the vehicle body frame and supports the front end portion of the leaf suspension. The protector support bracket is fixed to the vehicle body frame via the suspension bracket by being fastened to the suspension bracket from the vehicle width direction, and supports the front underrun protector extending from the rear at the front end portion of the vehicle in the vehicle width direction.

  In the above configuration, the protector support bracket that supports the front underrun protector is fixed to the vehicle body frame via the suspension bracket. Therefore, compared to the case where both the protector support bracket and the suspension bracket are fixed to the vehicle body frame, The bracket mounting space can be kept narrow, contributing to securing the mounting space for other parts.

  Since the protector support bracket is fastened to the suspension bracket from the vehicle width direction, when an excessive load is input from the front underrun protector during a vehicle collision, the protector support bracket and the suspension are removed before the suspension bracket is detached from the vehicle body frame. The protector support bracket can be detached from the suspension bracket by breaking the fastening portion with the bracket.

  Therefore, the support state of the front end portion of the leaf suspension by the suspension bracket can be maintained, and the vehicle can be prevented from being unable to travel.

  The mounting structure for the front underrun protector according to the second aspect of the present invention is the mounting structure for the front underrun protector according to the first aspect, and includes an under member.

  The under member extends along the vehicle width direction. The vehicle body frame has a pair of left and right side members extending in the front-rear direction on both sides in the vehicle width direction. The suspension bracket and the protector support bracket are provided on the left and right, respectively. The left and right suspension brackets are fixed to the left and right side members, respectively. The under member connects the left and right protector support brackets.

  In the above configuration, the load input from the leaf suspension to the suspension bracket on the left and right sides and the load input from the front underrun protector to the protector support bracket are input to the left and right side members and left and right via the under members. Also input to the other side member. That is, the load input to the suspension bracket and the protector support bracket can be distributed and supported on the left and right side members on one side of the left and right sides, and the support rigidity of the leaf suspension and the front underrun protector can be increased.

  According to the present invention, the front underrun protector is supported by the suspension bracket that supports the front end portion of the leaf suspension, and the front end portion of the leaf suspension is supported even when an excessive load is input from the front underrun protector. The state can be maintained.

It is a perspective view of the attachment structure of the front underrun protector concerning one embodiment of the present invention. It is the perspective view which looked at the attachment structure of the front under-run protector of FIG. 1 from the downward direction. It is a side view of the attachment structure of the front under-run protector of FIG. It is a top view of the attachment structure of the front under-run protector of FIG. It is a rear view of the attachment structure of the front underrun protector of FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the figure, the arrow FR indicates the front of the vehicle 1, UP indicates the upper side, and IN indicates the inner side in the vehicle width direction. In the following description, the front-rear direction means the front-rear direction of the vehicle 1, and the left-right direction means the left-right direction with the vehicle 1 facing forward.

  The vehicle 1 of the present embodiment is a cab-over type vehicle in which a cab (not shown) is positioned in front of an engine (not shown). As shown in FIGS. 1 to 3, a front underrun for restraining a partner vehicle from entering under the vehicle 1 at the time of a collision with a passenger vehicle having a vehicle height lower than that of the vehicle 1 is provided at a lower portion of the front end of the vehicle 1. A protector (FUP) 10 is provided. The FUP 10 is fixed to the vehicle body frame 3 of the vehicle 1 and extends in the vehicle width direction.

  A suspension bracket 4, a reinforcing plate 5, a leaf suspension 6, a FUP support bracket (protector support bracket) 7, an under member 8 and the like are attached to the body frame 3 side around the front end portion of the body frame 3, and the FUP 10 side. A stay 9 and the like are attached. The FUP 10 mounting structure 2 of the present embodiment includes a suspension bracket 4, an FUP support bracket 7, an under member 8, etc. in addition to the FUP 10 and the vehicle body frame 3, and a stay 9 fixed to the FUP 10 is fixed to the vehicle body frame 3. The FUP support bracket 7 is fastened. The mounting structure 2 is provided symmetrically on the left and right of the vehicle 1, and the left and right stays 9 and the FUP support bracket 7 support the left and right sides of the FUP 10. Since the left and right sides of the front end portion of the body frame 3 are configured in substantially the same manner, the left side will be described below, and the description on the right side will be omitted.

  The body frame 3 includes a pair of left and right side members 11, a cross member 12, and the like. The side members 11 extend in the front-rear direction on both sides in the vehicle width direction, and the front end portions of the left and right side members 11 are connected by the cross members 12. Each side member 11 has a U-shaped cross section that opens to the inner side in the vehicle width direction. Each side member 11 stands from a side member side plate 13 that extends substantially vertically and extends in the front-rear direction, and an upper edge and a lower edge of the side member side plate 13. A side member upper plate portion 14 and a side member lower plate portion 15 which are bent inward in the width direction and face each other are integrally provided.

  The suspension bracket 4 is provided on each of the left and right sides. Each suspension bracket 4 extends in the front-rear direction below the front side of the side member 11 and is fastened to the lower side of the side member lower plate portion 15 by a plurality of bolts 16 and nuts 17 screwed into the bolts 16 from below. Fixed. The suspension bracket 4 has a U-shaped cross section that opens to the lower side. The suspension bracket upper plate portion 18 extends back and forth so as to be parallel to the side member lower plate portion 15, and the left end edge and the right end of the suspension bracket upper plate portion 18. The suspension bracket outer plate portion 19 and the suspension bracket inner plate portion 20 are integrally formed by bending downward from the edge and facing each other. The plurality of bolts 16 are arranged in a straight line in the front-rear direction.

  The reinforcing plate 5 is provided on each of the left and right sides. Each reinforcing plate 5 includes a plurality of bolts 21 and nuts 22 screwed into the bolts 21 from the inside in the vehicle width direction so as to stand substantially vertically on the outside in the vehicle width direction of the side members 11 and the suspension bracket 4. The side member side plate portion 13 is fastened and fixed to the outside in the vehicle width direction. The reinforcing plate 5 includes a fastening and fixing part 23 that is fastened and fixed to the side member side plate part 13, a reinforcing part 24 that covers a part of the suspension bracket outer plate part 19 on the outer side in the vehicle width direction, and a fastening and fixing part 23 and a reinforcing part 24. And a projecting portion 25 projecting outward in the vehicle width direction at the center of the vehicle. The plurality of bolts 21 are arranged at six locations, that is, two locations on the fastening and fixing portion 23 on the front side of the protruding portion 25 and four locations on the fixing portion 23 on the rear side of the protruding portion 25.

  The leaf suspension 6 is provided on each of the left and right sides. Each leaf suspension 6 has a configuration in which a plurality of long plates of different lengths are stacked one above the other, and extends in the front-rear direction below the side member 11 with a space between the side members 11. Be placed. The front end portion of the leaf suspension 6 is disposed between the suspension bracket outer plate portion 19 and the suspension inner plate portion 20 and is supported by being fastened and fixed to the suspension bracket 4 by bolts 26 or the like.

  The FUP support brackets 7 are provided on the left and right, respectively. Each FUP support bracket 7 is disposed below the suspension bracket 4, and a plurality of bolts 27, 28 and nuts (not shown) screwed into the bolts 27, 28 are arranged on the front side of the suspension bracket 4 in the vehicle width direction. It is fastened and fixed. That is, the FUP support bracket 7 is fixed to the side member 11 via the suspension bracket 4 behind the FUP 10 and supports the FUP 10 from the rear via the stay 9.

  The FUP support bracket 7 includes an FUP bracket outer plate portion 30 that stands substantially vertically outside the suspension bracket outer plate portion 19 in the vehicle width direction, and an FUP bracket that stands substantially vertically inside the suspension bracket inner plate portion 20 in the vehicle width direction. The inner plate portion 31, the FUP bracket outer plate portion 30 and the FUP bracket inner plate portion 31 are welded and fixed to the lower end edges of the inner member 31 and extend in the vehicle width direction, and the inside of the FUP bracket outer plate portion 30 and the FUP bracket. A stay mounting surface 33 is fixed to each front end edge of the plate portion 31 by welding and extends in the vehicle width direction so as to face the FUP 10.

  The FUP bracket outer plate portion 30 integrally includes an outer plate fixing portion 34 fastened and fixed to the suspension bracket outer plate portion 19 and an outer plate extending portion 35 extending downward from the outer plate fixing portion 34. The FUP bracket outer plate portion 30 is fastened and fixed to the front side of the suspension bracket outer plate portion 19 by a plurality of bolts 27 and nuts (not shown) screwed into the bolts 27 from the inner side in the vehicle width direction. The plurality of bolts 27 are arranged at four locations on the outer plate fixing portion 34.

  The FUP bracket inner plate portion 31 integrally includes an inner plate fixing portion 36 fastened and fixed to the suspension bracket inner plate portion 20 and an inner plate extending portion 37 extending downward from the inner plate fixing portion 36. The FUP bracket inner plate portion 31 is fastened and fixed to the front side of the suspension bracket inner plate portion 20 by a plurality of bolts 28 and nuts (not shown) screwed to these bolts 28 from the outside in the vehicle width direction. The plurality of bolts 28 are arranged at two locations on the inner plate fixing portion 36.

  The under member mounting surface 32 is fastened and fixed to the end of the under member 8 in the vehicle width direction by a plurality of bolts 38 and 39 and a nut 40 screwed to the bolts 38 and 39.

  The stay mounting surface 33 is fastened and fixed to the stay rear end member 50 by a plurality of bolts 41 and nuts 43 that are screwed into the bolts 41 from behind via a plurality of bolts 41.

  The under member 8 extends along the vehicle width direction below the left and right FUP support brackets 7 and is fastened and fixed to the FUP support bracket 7 by a plurality of bolts 38 and 39 and nuts 40 screwed into the bolts 38 and 39. As a result, the left and right FUP support brackets 7 are connected.

  The under member 8 is a rectangular tube having a rectangular cross section that opens at both ends in the vehicle width direction. The under member upper plate portion 44 is parallel to the under member mounting surface 32 of the FUP support bracket 7, and the front end edge and the rear end of the under member upper plate portion 44. An under member front plate portion 45 and an under member rear plate portion 46 that extend downward from the end edges and face each other, and an under member upper plate portion 44 that extends from the lower end edge of the under member front plate portion 45 to the lower end edge of the under member rear plate portion 46. An under member lower plate portion 47 facing each other is integrally provided.

  The under member upper plate portion 44 is longer in the vehicle width direction than the under member lower plate portion 47 and extends to both sides in the vehicle width direction. The under member upper plate portion 44 is fastened and fixed to the under member mounting surface 32 of the FUP support bracket 7 by a plurality of bolts 38 and nuts 40 screwed into the bolts 38 from below. The plurality of bolts 38 are disposed at two locations on the outer member mounting surface 32 on the outer side in the vehicle width direction than the FUP bracket outer plate portion 30.

  The under member lower plate portion 46 is fastened and fixed to the under member mounting surface 32 of the FUP support bracket 7 by a plurality of bolts 39 and nuts (not shown) screwed into the bolts 39 from above. The plurality of bolts 39 are disposed at two locations on the outer side of the under member lower plate portion 47 in the vehicle width direction.

  The stays 9 are respectively provided on the left and right sides to fix the FUP 10 to the side member 11 via the suspension bracket 4 and the FUP support bracket 7. Each stay 9 is disposed in front of the FUP support bracket 7, and is fastened and fixed to the front side of the FUP support bracket 7 by a plurality of bolts 41 and nuts 43 that are screwed into the bolts 41 from behind by interposing a washer 42. Is done.

  The stay 9 includes an FUP mounting surface 48 that stands substantially vertically behind the FUP 10, a stay main body 49 that is fastened and fixed to the FUP 10 via the FUP mounting surface 48, and extends rearward toward the FUP support bracket 7. And a stay rear end member 50 fixed to the FUP support bracket 7.

  The front end portion of the stay main body 49 is welded and fixed to the FUP mounting surface 48 on the inner side in the vehicle width direction on the rear surface. The FUP mounting surface 48 is fastened and fixed to the rear side of the FUP 10 by a plurality of bolts 51 and nuts 52 that are screwed into the bolts 51 from behind.

  The stay main body 49 is a rectangular tube having a rectangular cross section with both front and rear ends open, and a pair of left and right stay side wall portions 53 that stand up and oppose each other in the front and rear direction, and one upper end of the left and right stay side wall portions 53. A stay upper plate portion 54 extending from the edge to the other upper end edge, and a stay lower plate portion 55 extending from one lower end edge of the left and right stay side wall portions 53 to the other lower end edge and facing the stay upper plate portion 54. Have one.

  The rear end member 50 of the stay is in surface contact with the stay mounting surface 33 of the FUP support bracket 7 from the front, and a plurality of bolts 41 and a nut 43 that is screwed into the bolts 41 from the rear with a washer 42 interposed therebetween. A fastening plate portion 57 fastened and fixed to the stay mounting surface 33 by left and right stay fastening portions 56 separated in the width direction, and a stay rear end flange portion 58 extending forward from the fastening plate portion 57 between the left and right stay fastening portions 56. And integrally.

  The stay rear end flange portion 58 includes a pair of left and right flange side portions 59 that stand up and oppose each other in the front-rear direction on the outside of the left and right stay side wall portions 53 in the stay main body 49, and upper end edges of the left and right flange side portions 59. It has a U-shaped cross section that integrally has a flange upper surface portion 60 that connects the two and opens downward. A flange upper surface reinforcing plate 61 for reinforcing the flange upper surface portion 60 is welded and fixed to the front surface of the fastening plate portion 57 of the stay rear end member 50.

  The rear end portion of the stay main body 49 is inserted between the left and right flange side surface portions 59 of the stay rear end member 50, and each of the left and right flange side surface portions 59 is welded and fixed to the left and right stay side wall portions 53, respectively.

  As described above, in the present embodiment, since the FUP support bracket 7 that supports the FUP 10 is fixed to the vehicle body frame 3 via the suspension bracket 4, both the FUP support bracket and the suspension bracket are fixed to the vehicle body frame. As compared with the above, the bracket mounting space on the vehicle body frame 3 side can be kept narrow, which contributes to securing the mounting space for other components.

  Further, since the FUP support bracket 7 is fastened to the suspension bracket 4 from the vehicle width direction, the FUP support bracket 7 is removed before the suspension bracket 4 is detached from the vehicle body frame 3 when an excessive load is input from the FUP 10 at the time of a vehicle collision. The FUP support bracket 7 can be detached from the suspension bracket 4 by breaking the fastening portion between the suspension bracket 4 and the suspension bracket 4.

  Therefore, the state in which the front end portion of the leaf suspension 6 is supported by the suspension bracket 4 can be maintained, and the vehicle 1 can be prevented from being unable to travel.

  Further, the load input from the leaf suspension 6 to the suspension bracket 4 on the left and right sides and the load input from the FUP 10 to the FUP support bracket 7 are input to the left and right side members 11 and left and right via the under members 8. It inputs also to the side member 11 of the other side. That is, the load input to the suspension bracket 4 and the FUP support bracket 7 can be dispersed and supported on the left and right side members 11 on one side of the left and right sides, and the support rigidity of the leaf suspension 6 and the FUP 10 can be increased.

  In the present embodiment, the FUP support bracket 7 and the stay 9 are separate components, but they may be configured as a single component as an FUP support bracket.

  As mentioned above, although the embodiment to which the invention made by the present inventor is applied has been described, the present invention is not limited by the discussion and the drawings that form part of the disclosure of the present invention according to this embodiment. That is, it should be added that other embodiments, examples, operation techniques, and the like made by those skilled in the art based on this embodiment are all included in the scope of the present invention.

  The mounting structure of the front underrun protector according to the present invention can be used for trucks and other vehicles.

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Front underrun protector mounting structure 3 Body frame 4 Suspension bracket 6 Leaf suspension 7 FUP support bracket (Protector support bracket)
8 Under member 10 Front underrun protector (FUP)
11 Side members

Claims (2)

A suspension bracket fixed to the body frame and supporting the front end of the leaf suspension;
A protector support bracket that is fixed to the vehicle body frame via the suspension bracket by being fastened to the suspension bracket from the vehicle width direction, and that supports a front underrun protector extending from the rear at the front end portion of the vehicle in the vehicle width direction; A mounting structure for a front underrun protector. A mounting structure for a front underrun protector according to claim 1,
It has an under member that extends along the vehicle width direction,
The vehicle body frame has a pair of left and right side members extending in the front-rear direction on both sides in the vehicle width direction,
The suspension bracket and the protector support bracket are provided on the left and right, respectively.
The left and right suspension brackets are respectively fixed to the left and right side members,
The under-under protector mounting structure, wherein the under member connects the left and right protector support brackets.

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